po plugin: updated todo / doc

[git.ikiwiki.info.git] / doc / plugins / po.mdwn

diff --git a/doc/plugins/po.mdwn b/doc/plugins/po.mdwn
index 6b04afd72f35b899352864108794c7ac289abf5f..1a9144aee2ed4124a1353976c8e988b4718918a7 100644 (file)
--- a/doc/plugins/po.mdwn
+++ b/doc/plugins/po.mdwn
@@ -12,9 +12,9 @@ Introduction
 A language is chosen as the "master" one, and any other supported
 language is a "slave" one.
 
 A language is chosen as the "master" one, and any other supported
 language is a "slave" one.
 

-A page written in the "master" language is a "master" page, and is
-written in any supported format but PO. It does not have to be named
-a special way: migration from/to this plugin does not imply heavy
+A page written in the "master" language is a "master" page. It can be
+of any page type supported by ikiwiki, but PO. It does not have to be
+named a special way: migration to this plugin does not imply any page

 renaming work.
 
 Example: `bla/page.mdwn` is a "master" Markdown page written in
 renaming work.
 
 Example: `bla/page.mdwn` is a "master" Markdown page written in


@@ -33,7 +33,10 @@ rendered as `bla/page/index.fr.html`, else as `bla/page.fr.html`
 Configuration
 =============
 
 Configuration
 =============
 

-`po_master_language` is used to set the master language in
+Supported languages
+-------------------
+
+`po_master_language` is used to set the "master" language in

 `ikiwiki.setup`, such as:
 
         po_master_language => { 'code' => 'en', 'name' => 'English' }
 `ikiwiki.setup`, such as:
 
         po_master_language => { 'code' => 'en', 'name' => 'English' }


@@ -53,23 +56,32 @@ The `po_translatable_pages` setting configures what pages are
 translatable. It is a [[ikiwiki/PageSpec]], so you have lots of
 control over what kind of pages are translatable.
 
 translatable. It is a [[ikiwiki/PageSpec]], so you have lots of
 control over what kind of pages are translatable.
 

-The `*.LL.po` translations files are anyway not considered as being
-translatable, so you don't need to worry about excluding them manually
-from this [[ikiwiki/PageSpec]].
+The PO translations files are anyway not considered as being
+translatable, so you don't need to worry about excluding them
+explicitly from this [[ikiwiki/PageSpec]].

 
 Internal links
 --------------
 
 
 Internal links
 --------------
 

-One can use the `po_link_to_` option in `ikiwiki.setup` to choose how
+The `po_link_to` option in `ikiwiki.setup` is used to decide how

 internal links should be generated, depending on web server features
 and site-specific preferences.
 
 ### Default linking behavior
 
 If `po_link_to` is unset, or set to `default`, ikiwiki's default
 internal links should be generated, depending on web server features
 and site-specific preferences.
 
 ### Default linking behavior
 
 If `po_link_to` is unset, or set to `default`, ikiwiki's default

-linking behavior is preserved: `\[[page]]` links to the master
+linking behavior is preserved: `\[[destpage]]` links to the master

 language's page.
 
 language's page.
 

+### Link to current language
+
+If `po_link_to` is set to `current`, `\[[destpage]]` links to the
+`destpage`'s version written in the current page's language, if
+available, *i.e.*:
+
+- `foo/destpage/index.LL.html` if `usedirs` is enabled
+- `foo/destpage.LL.html` if `usedirs` is disabled
+

 ### Link to negotiated language
 
 If `po_link_to` is set to `negotiated`, `\[[page]]` links to the
 ### Link to negotiated language
 
 If `po_link_to` is set to `negotiated`, `\[[page]]` links to the


@@ -77,137 +89,189 @@ negotiated preferred language, *i.e.* `foo/page/`.
 
 (In)compatibility notes:
 
 
 (In)compatibility notes:
 

-- `po_link_to => negotiated` provides no useful behavior if `usedirs`
-  is disabled; this option combination is neither implemented nor
-  allowed
-- `po_link_to => negotiated` provides no useful behavior if the web
-  server does not support Content Negotiation
+- if `usedirs` is disabled, it does not make sense to set `po_link_to`
+  to `negotiated`; this option combination is neither implemented
+  nor allowed.
+- if the web server does not support Content Negotiation, setting
+  `po_link_to` to `negotiated` will produce a unusable website.

 
 

-### Link to current language

 
 

-If `po_link_to` is set to `current` and the destination page is either
-a translatable page or a translation, `\[[page]]` links to the current
-page's language, *i.e.*:
+Server support
+==============

 
 

-- `foo/page/index.LL.html` if `usedirs` is enabled
-- `foo/page.LL.html` if `usedirs` is disabled
+Apache
+------

 
 

+Using Apache `mod_negotiation` makes it really easy to have Apache
+serve any page in the client's preferred language, if available.
+This is the default Debian Apache configuration.
+
+When `usedirs` is enabled, one has to set `DirectoryIndex index` for
+the wiki context.
+
+Setting `DefaultLanguage LL` (replace `LL` with your default MIME
+language code) for the wiki context can help to ensure
+`bla/page/index.en.html` is served as `Content-Language: LL`.
+
+lighttpd
+--------
+
+lighttpd unfortunately does not support content negotiation.
+
+**FIXME**: does `mod_magnet` provide the functionality needed to
+ emulate this?
+
+
+Usage
+=====

 
 Templates
 ---------
 
 
 Templates
 ---------
 

-The `OTHERLANGUAGES` loop provides ways to display the existing
-translations and/or master page. One typically adds the following code
-to `templates/page.tmpl`:
+The `ISTRANSLATION` and `ISTRANSLATABLE` variables can be used to
+display things only on translatable or translation pages.
+
+### Display page's versions in other languages
+
+The `OTHERLANGUAGES` loop provides ways to display other languages'
+versions of the same page, and the translations' status.
+
+One typically adds the following code to `templates/page.tmpl`:

 
        <TMPL_IF NAME="OTHERLANGUAGES">
        <div id="otherlanguages">
          <ul>
          <TMPL_LOOP NAME="OTHERLANGUAGES">
            <li>
 
        <TMPL_IF NAME="OTHERLANGUAGES">
        <div id="otherlanguages">
          <ul>
          <TMPL_LOOP NAME="OTHERLANGUAGES">
            <li>

-             <a href="<TMPL_VAR NAME="URL">"
-                class="is_master_<TMPL_VAR NAME="MASTER">">
-             <TMPL_VAR NAME="LANGUAGE">
-           </a>
+             <a href="<TMPL_VAR NAME="URL">"><TMPL_VAR NAME="LANGUAGE"></a>
+             <TMPL_UNLESS NAME="MASTER">
+               (<TMPL_VAR NAME="PERCENT">&nbsp;%)
+             </TMPL_UNLESS>

            </li>
          </TMPL_LOOP>
          </ul>
        </div>
        </TMPL_IF>
 
            </li>
          </TMPL_LOOP>
          </ul>
        </div>
        </TMPL_IF>
 

+The following variables are available inside the loop (for every page in):

 
 

-Server support
-==============
+- `URL` - url to the page
+- `CODE` - two-letters language code
+- `LANGUAGE` - language name (as defined in `po_slave_languages`)
+- `MASTER` - is true (1) if, and only if the page is a "master" page
+- `PERCENT` - for "slave" pages, is set to the translation completeness, in percents

 
 

-Apache
-------
+### Display the current translation status

 
 

-Using `mod_negotiation` makes it really easy to have Apache serve the
-page in the client's preferred language, if available. This is the
-default Debian Apache configuration.
+The `PERCENTTRANSLATED` variable is set to the translation
+completeness, expressed in percent, on "slave" pages.

 
 

-When `usedirs` is enabled, one has to set `DirectoryIndex index` for
-the wiki context.
+One can use it this way:

 
 

-Setting `DefaultLanguage LL` (replace `LL` with your default MIME
-language) for the wiki context can be needed, to ensure
-`bla/page/index.en.html` is served as `Content-Language: LL`.
-**FIXME**: is it still needed with the new `.en.html` naming convention?
+       <TMPL_IF NAME="ISTRANSLATION">
+       <div id="percenttranslated">
+         <TMPL_VAR NAME="PERCENTTRANSLATED">
+       </div>
+       </TMPL_IF>

 
 

-lighttpd
---------
+Additional PageSpec tests
+-------------------------

 
 

-lighttpd unfortunately does not support content negotiation.
+This plugin enhances the regular [[ikiwiki/PageSpec]] syntax with some
+additional tests that are documented [[here|ikiwiki/pagespec/po]].

 
 

-**FIXME**: does `mod_magnet` provide the functionality needed to
- emulate this?
+Automatic PO files update
+-------------------------

 
 

+Committing changes to a "master" page:

 
 

-TODO
-====
+1. updates the POT file and the PO files for the supported languages
+   (this is done in the `needsbuild` hook); the updated PO files are
+   then put under version control
+2. triggers a refresh of the corresponding HTML slave pages (this is
+   achieved by making any "slave" page dependent on the corresponding
+   "master" page, in the `needsbuild` hook)

 
 

-Link relationships
-------------------
+Also, when the plugin has just been enabled, or when a page has just
+been declared as being translatable, the needed POT and PO files are
+created, and the PO files are checked into version control.

 
 

-Should pages using the `OTHERLANGUAGES` template loop be declared as
-linking to the same page in other versions?
+TODO
+====

 
 

-View translation status
------------------------
+OTHERLANGUAGES dependencies
+---------------------------

 
 

-One should be able to view some information about the translation
-completeness, either for a given page or for the whole wiki.
+Pages using `OTHERLANGUAGES` depend on any "master" and "slave" pages
+whose status is being displayed. It is supposed to trigger dependency
+loops, but no practical bugs were noticed yet.

 
 

-This should not be too hard using gettext tools. If this is
-implemented as a
-[HTML::Template](http://search.cpan.org/search?mode=dist&query=HTML%3A%3ATemplate)
-loop, a page using it should depend on any "master" and "slave" pages
-whose status is being displayed.
+Should pages using the `OTHERLANGUAGES` template loop be declared as
+linking to the same page in other versions? To be rigorous, they
+should, but this may clutter the backlinks.
+
+Security checks
+---------------
+
+- `refreshpofiles` uses `system()`, whose args have to be checked more
+  thoroughly to prevent any security issue (command injection, etc.).
+- `refreshpofiles` and `refreshpot` create new files; this may need
+  some checks, e.g. using `IkiWiki::prep_writefile()`
+
+gettext/po4a rough corners
+--------------------------
+
+- fix infinite loop when synchronizing two ikiwiki (when checkouts
+  live in different directories): say bla.fr.po has been updated in
+  repo2; pulling repo2 from repo1 seems to trigger a PO update, that
+  changes bla.fr.po in repo1; then pushing repo1 to repo2 triggers
+  a PO update, that changes bla.fr.po in repo2; etc.; fixed in
+  `629968fc89bced6727981c0a1138072631751fee`?
+- new translations created in the web interface must get proper charset/encoding
+  gettext metadata, else the next automatic PO update removes any non-ascii
+  chars; possible solution: put such metadata into the Pot file, and let it
+  propagate; should be fixed in `773de05a7a1ee68d2bed173367cf5e716884945a`, time
+  will tell.
+
+Misc. improvements
+------------------

 
 

-If it's not too heavy to compute, this status data may be made
-available in the `OTHERLANGUAGES` template loop; else, a dedicated
-loop would be needed.
+### automatic POT/PO update

 
 

-Automatic PO files update
--------------------------
+Use the `change` hook instead of `needsbuild`?

 
 

-Committing changes to a "master" page must:
+### page titles

 
 

-1. update the POT file and the PO files for the supported languages;
-   this is done in the `needsbuild` hook; the updated PO files must
-   then be put under version control
+Use nice page titles from meta plugin in links, as inline already does.

 
 

-2. trigger a refresh of the corresponding HTML slave pages; this can
-   be implemented by making any "slave" page depend on the
-   corresponding "master" page. The `add_depends` function can achieve
-   this, if used in a **FIXME** hook.
+### websetup

 
 

-Also, when the plugin has just been enabled, all the needed POT and PO
-files have to be created.
+Which configuration settings are safe enough for websetup?

 
 

-UI consistency: rename "Edit" button on slave pages
----------------------------------------------------
+### Discussion pages

 
 

-It may be surprising to some, after having pressed *Edit* on a wiki
-page, to end up editing a strange looking PO file. The *Edit* button
-displayed on "slave" pages must therefore be renamed *Improve
-translation* .
+Decide something, probably that "slave" pages, being only translations, don't
+deserve a discussion page: the discussion should happen in the language in which
+the pages are written for real, which is the "master" one.

 
 

-Pages selection depending on language
--------------------------------------
+### parentlinks

 
 

-To improve user navigation in a multi-lingual wiki, site developers
-must be enabled to write:
+When the wiki home page is translatable, the parentlinks plugin sets
+`./index.html` as its translations' single parent link. Ideally, the home page's
+translations should get no parent link at all, just like the version written in
+the master language.

 
 

-        \[[!map pages="dev/* and lang(LL)" feeds="no"]]
+### backlinks

 
 

-        \[[!map pages="dev/* and currentlang()" feeds="no"]]
+If a given translatable `sourcepage.mdwn` links to \[[destpage]],
+`sourcepage.LL.po` also link to \[[destpage]], and the latter has the master
+page *and* all its translations listed in the backlinks.

 
 Translation quality assurance
 -----------------------------
 
 
 Translation quality assurance
 -----------------------------
 

-Modifying a PO file via the CGI must only be allowed if the new
-version is a valid PO file. As a bonus, check that it provides a more
+Modifying a PO file via the CGI must be forbidden if the new version
+is not a valid PO file. As a bonus, check that it provides a more

 complete translation than the existing one.
 
 A new `cansave` type of hook would be needed to implement this.
 complete translation than the existing one.
 
 A new `cansave` type of hook would be needed to implement this.


@@ -221,6 +285,8 @@ Translating online
 As PO is a wiki page type, we already have an online PO editor, that
 is ikiwiki's CGI.
 
 As PO is a wiki page type, we already have an online PO editor, that
 is ikiwiki's CGI.
 

+**FIXME** preview does not work for PO files.
+

 A message-by-message interface could also be implemented at some
 point; a nice way to do offline translation work (without VCS access)
 still has to be offered, though.
 A message-by-message interface could also be implemented at some
 point; a nice way to do offline translation work (without VCS access)
 still has to be offered, though.